Mixing apparatus



June 4, 1935. c GILBERT r AL 2,003,829

MIXING APPARATUS Filed Nov. 28, 1951 4 Sheets-Sheet 1 June 4, 1935. A. c. GILBERT AL 2,003,829

MIXING APPARATU S Fil ed Nov. 28, 1951 4 Sheets-Sheet 2 June 4,1935. A. Q GlL-B ERf-ET AL 2,003,329

MIXING APPARATUS Filed Nov. 28, 1951 4 Sheets-Sheet 5 June 4, 1935. A.- c. GILBERT ET AL 2,003,829

MIXING APPARATUS I Filed Nov. 28, 1931 4 sheet-sheet 4 III Patented 4, 1935 I UNITED STATES PATENT- oFrlcr, zmaszs MIXING APPARATUS Alfred 0. Gilbert, North Haven, and Arthur A. Arnold, New Haven, Conn, assignors to The A. C. Gilbert Company, New Haven, Conn., a corporation of Maryland Application November 28, 1931, Serial No. 577,754

12 Claims. (oi. 259-102) Our invention relates to a mixing appara s I indicates, in general. the imp o mixing anand more especially to a portable mixing apparaparatus which includes a base ll, pressed out of tus suitable for whipping cream, mixing cake batsheet material and inwardly dished at its upper ters, or stirring, mixing, or whipping otherplasend to form a relatively flat face l2 and an annu- 5 tic or liquid materials. lar flange-like rim portion I3, in which a cylindri- I One of the general objects of the invention is cal casing 13 is received, casing I3 being secured to bring about a form of mixing apparatus in v on face l2, and embraced by rim 13. On the which a rotatable stirring element is mounted for upper end ii of casing I3 is a mixing bowl I 3, orbital movement in a receptacle to reach -all the latter being provided on its lower end with parts of the material contained in the receptacle. rib II, received within the open end I! of casing 10 In a more specific aspect, the invention relates l3, and serving to position the bowl thereon. to a power driven mixer wherein a mixing bowl is The reference numeral l3 'indicates, in genmounted on a casing containing an electric moeral, an electric motor herein provided with a tor, a stirring element being mounted to operate field magnet 19, an armature 20, and brushes 2 I,

. 15 within the bowl and connected to the motor by the motor l8 being secured to base I I by means 1;

mechanism extending.v upwardly through the of threaded rods 22, which pass through base H,

bowL p arms 23 of lower bearing 23, spacers 23, field A feature of the invention resides in a simple magnet it, a disk-like plate 23,and reduction form. of power connection between the stirring gearing case 21, the various parts through which element and the motor, wherein the former is rothe rods extend being" "clamped together by nuts go I tated and moved throughapredetermined orbital 23, on the ends of rod @22. Gear casing 21 inpath in the bowl. .cludes a bearing 23 for shaft am: motor l3, and

A further feature of the invention resides in a an upwardly extending-boss 3| in which a -verform of mixing apparatus wherein the bowl, bowl tical shaft 32 is mounted, shaft 32'having a gear '25- support, stirring element or elements, and driv- 33 on the lower end thereof, gear 33 meshing :5

ing connections therefor, may be readily sepwith gear 33 on the end of shaft 33. The end stated for cleaning and other purposes. thrust in shaft 32 is taken .up by a collar 32' into- To these and other ends, the invention consists grally formed with respect thereto, and resting in the novel features and combinations of parts on a ball-bearing 35 (not shown herein in detail),

to be hereinafter described and claimed. at the upper end of boss 3|, the thrust in the op- 30 In the drawings: DOBite direction being taken up by contact of Fig. 1 is a front elevational view in section of gear 33 with a face 33 at the lower end of boss 3!.

a mixing apparatus according to our invention; Gear is secured on shaft 32 in any desired Fig. 2 is a cross-secticnalview taken along line manner, herein, the lower end 31 of the shaft 2--2-of Fig. 1: being provided with a key 33 and being threaded 35 'Fig. 3 is a cross-sectional view taken along line for the reception of nut 33, which bears against 3--3 of Fig. 1, but on an enlarged scale; the gear. Fig. 4 is a cross-sectional view along line 3--3 The reference numerals 33 and 33 indicate, in of Fig, 1; general, a pair of stirring elements mounted for 40 Pig. 5v is a cross-sectional view of a modiflcarotation on shafts 3| and 32, extending upward- 40 I 1y through a gear housing 33, the latter having a 4 Fig. 6 is a front'elevationai view of another rib 33 in which openings 33 and 33 for shafts 3| modification: and 32 are provided, the shafts being secured fication shown in Fig.6;

Fig. 7 is a fragmentary plan view of the modiagainst movement in openings 35 and 33 by means of plate 31 which is m d against the shafts a Fig. 8 is a cross-sectional view of a part of the by thumb screw .33, extending through plate 31 driving connections of, the modifications shown and threaded in rib .33. On the upper ends of in i .5; stirring elements 33 and 33 are gears 33 and 33, Fig. 9 is a front elevational view. of still another which are in mesh with one another, while gear so -modiflcation, and I 33 is in mesh with gear 3|,having a spindle 52 Fig. 10 is a cross-sectional view along line rotatabiy mounted in boss 33 of gear housing 33. l3-l3 ofr'ig. 9. gear "being driven'by gear 33, secured on shaft "Referring to the drawings in which we-have II, the latter being supported-in boss 33 of gear illustrated our invention by showing a preferred housing 33. Axial movement of shaft 33 is me 66 embodiment of the same.,the reference numeral vented by gear 33 which against one end 1 of boss 56, and by the collar 51 secured on shaft 55 at the opposite end of boss 55.

' alignment. On the lower end of sleeve 58 a rela tively flat plate 5| is secured, plate 5| having a disc-like central portion attached to sleeve 58 and a pair of radially and downwardly directed arms 52 and 53, which contact with ribs 54 and 55 on the upper end 55 of an inwardly dished conical portion 51 of bowl I5. The shaft 55 extends downwardly through sleeve 58 and on the lower end of shaft 55 an extension 58 is secured, extension 58 being bored at its lower end for reception on shaft 32, the latter being provided with a diametrically extending pin 58, the ends of which are received in slots 10 and 1| in the lower end of extension 58. I

- In operation, the motor I8 may be connected to any suitable source of power, the motor I8 through gears 33 and 54 rotating shaft 32 which, by means of the pin and slot connections 59, 10 and 1| causes the rotation ofextension 55 and thus the rotation of shaft 55. As shaft'55 rotates, the gear 54 drives gears. and 50 through idler gear 5| and thus brings about the rotation of stirring elements 59 and 40. Rotation of gear 5| produces rotation of gear 50 and since the latter is in mesh with stationary gear 59, the gear housing will be caused to move around gear 59 and shaft 55- to produce an orbital-movement of the stirring elements 59 and 49. The gear 59 is held against rotation through its connection with sleeve 55, and the connection of the latter to arms 52 and 53, which engage ribs 54 and 55 on the upper end of the conical inwardly dished portion 51 of stationary bowl I5.

- When the mixing.'operation is complteted, the

- stirring elements 55 and 40, together with the gear housing 45 and the gears mounted therein, as well as sleeve 58, plate 5| and shaft extension 55, may be readily withdrawn upwardly, whereupon the bowl I5 may be liftedv from the upper end of casing I4. By loosening thumb screw 45, the shafts 4| and 42 may be readily moved out of openings 45 and 45 to separate the :elements from the gear housing 45, whereupon the stirring elements may be wise cleansed.

InIigSofthedrawingswehaveshowna modification inwhich a sleeve 15 is fixed on washed or other- :the lower end of hub 15 of gear 11, gear 11 corre- In Figs. 5, 7 and 8 we have shown another modificationin which the stirring element or elei-ments' 55 are driven by means of gear 54, mount- .ed on shaft 55, fixed in gear housing 55, gear 54 beinginmeshwithidlergearflfixedonshaft 55, on which a gear 55 islikewise fixed, gear 51 being in mesh with gear." on the upper end of shaft 9|, which corresponds to shaft of Fig. 1. Gearisinmeshwithgear 52 fixedonthe lower end of sleeve 55, extending upwardly through opening 54 in boss 55 of gear housing 55, sleeve 55 being enlarged at its upper end 55,

rod 51 which extends outwardly from the sleeve 93 and downwardly at 98 to engage a lug 99, on bowl I00, to hold the sleeve against rotation.

The operation of the gearing-in this form will be readily understood, the stirring elements 55 being rotated by gear acting through gears 81 and 54, while the stirring elements are carried around within the bowl by the action of gear 89 on stationary gear 92. Shaft 58 is held against axial movement in a downward direction by collar IOI, which is fixed on the upper end of the shaft by set screw I02, while downward movement of the reduced upper end I03 of shaft 9| is prevented by collar I04 secured on the upper end of shaft 9| by set screw I05.

That form of the invention shown in Fig. 9 of the drawings is quite similar to that shown in Figs. 6, '1 and 8 except that the lug of Figs. 6

and '1 isreplaced by a bracket I05, fixed on the side of casing I01 and provided with an aperture I08 in which the lower end of rod I09 is received.

The bowls are held against rotation by means of integrally formed lugs IIO which extend downwardly into openings III in' the casings I4 or I01.

In certain aspects, our invention may be used in connection with the juice extracting device shown in the patent of Alfred 0. Gilbert for Orange juice extractor, No. 1,797,190 dated March 17,1931, and the co-pending application of Alfred C. Gilbert for Fruit Juice extractor, filed February 14, 1929, Serial No. 339,785. The latter especially shows a iuice extractor having a base, casing, motor and reduction gear quite similar to that disclosed herein, and the bowl, stirring ings, sdthat a draft of air may pass upwardly through opening 15 in base II, and upwardly between the disk .25 and casing I4, the draft of air being produced by a fan,14"mounted on motor shaft 55.

..'While we have shown'and described preferred embodiments of our invention, it will be understoodthatitisnottobelimitedtothedetails 'shown but is capable of modification and variation within the spirit of the invention and the scope of the appended claims.

disposed electric motor structure, relatively fiat horizontal plates mounted one on either end of said motor structure and supported thereby, a casing connected to and extending upwardly from one of said plates and beyond the other plate, said casing and plates substantially enclosing said motor structure, the upper plate being slightly spaced from the inner walls of the casing to permit the e of air therebetween, a'bowl on the upper end of said casing, a material treating element within said bowl, and means connected to said motor structure and extending upwardly through said bowl for driving said was enlar ed u d mporting a'bent element.

2. In a material treating machine, a vertically disposed electric motor structure, relatively flat horizontal plates mounted one on either end of said motor structure, a casing connected to and extending upwardly from one of said plates and beyond the other plate, the periphery of the upper plate being spaced slightly from the inner walls of the casing to permit the passage of air,

therebetween, a fan on the motor shaft for forcing air upwardly through said space, a bowl on the upper end of said casing, a material treating element within said bowl, and means connected to said motor structure and extending upwardly through said bowl for driving said element.

3. In a mixing apparatus, a bowl; a driven shaft extending upwardly through said bowl, a

rotation on said housing, and means for giving,

said stirring element a planetary motion in said bowl comprising a gear for said stirring element,

a gear in mesh with the first named gear and the gear on said stirring element, and another gear driven thereby in mesh with the stationary gear.

4. In a mixing apparatus, a bowl, a driven shaft extending upwardly through saidbowlfa stationary ,sle'eve within said bowl having a gear secured thereon, said shaft having a part extending through and rotatably mounted in said sleeve, a stirring element in said bowl, and means for giving said stirring element a planetary motion comprising a gear onsaid shaft, a gear for the stirring-element, an idler gear between said gears, a gear secured to and rotatable with, said idler gear, said last mentioned gear meshing with the gear on the stationary sleeve.

5. In a mixing apparatus, a bowl, a drive shaft extending upwardly through said bowl, a stirring element in said bowl, and means for giving said stirring element a planetary movement in said bowl comprising a relatively large stationary gear, a smaller geardriven by the shaft, a gear for the stirring element, an idler gear between the smaller gear and the gear forthe stirring element, and a relatively small gear driven by the idler gear andin mesh with the stationary gear.

6. In a mixing apparatus, a bowl, a drive shaft extending upwardly through said bowl, a stirring element in said bowl, and means for giving said stirring element a planetary motion in the bowl comprising a gear housing rotatably mounted on the upper end of said shaft, a relatively large stationary gear, a smaller gear mounted on and driven by said shaft, a gear for the stirring element rotatably mounted on said housing, an idler gear rotatably mounted on said housing and in m'eshyvith the gear on said shaft and the gear for the stirring element, and a gear driven by saididler' gear and meshing with the stationarygearv 7 In a mixing apparatus, a bowl, 9. drive shaft extending upwardly through said bowl, astirring element in said bowl, and means for giving said stirring element a planetarymotion in the bowl comprising a stationary sleeve through-which the upper end of the drive shaft extends a relatively large stationary gear mounted "on said sleeve conjournaled on the upper end of said shaft, a

for the stirring element rotatably mounted on said housing, a gear mounted on said shaft and driven 1 8. In a mixing apparatus, a bowl, a stationary part, upon which said bowl is mounted, driving means extending into said bowl and including a gear, a pair of rotatable beating elements extending into said bowl, a support for 'said beating elements supported by said driving means, said beating elements having overlapping paths of rotation, gears on said support drivingly connecting said heating elements and gears drivingly connecting one of said elements to the gear on said driving means to provide for the rotation of the elements in opposite directions, and gearing driven by said driving means and coacting with said stationary part to rotate the beating elements about the bowl axis.

9. In a mixing apparatus having a bowl with a centrally located aperture, and a stirring element extending into the bowl, the combination of a self-supporting driving means for said stirring element comprising a motor below said bowl, a vertical shaft supported by and driven from said motor, said shaft having a reduced upper end, a second shaft telescopically received upon the reduced upper end of the first named shaft and driven thereby, a stirring element support rowith the stationary tatably positioned'on the upper end of said second named sha'ft, said stirring element being rotatably mounted on said support, a sleeve on said second named shaft below said support,

means for' holding said sleeve against rotation,

a stationary gear mounted on said sleeve, a gear mounted on said second named shaft above said sleeve, a gear for said stirring element, and gearing interconneeting the gear on said second named shaft and the gears on said stirring element and sleeve respectively.

10. In a material treating device, a vertically disposed electric motor, a vertically disposed casing about said motor, a shaft-supportedby, extending upwardly from and drivenby said motor, a bowl detachably seated upon the upper end of said casing and having a central sleeve portiontherein, another shaft" supported by and detachably and drivingly connected to the upper end of said first-mentioned shaft and extending upwardly through said bowl by way of said sleeve portion to a point substantially above the upper edge of the bowl, a beater support adapted to swing in a horizontal plane about an axis coiincidentwith the bowl axis, means for mounting said support detachably on said last-named shaft at the upper end thereof at a point spaced substantially above the bowl rim, a pair of beaters having overlapping paths of rotation mounted on said support and depending into the bowl,

and means associated .with said support for effecting rotation of said beaters about their axes at high speed and orbital movement of the beaters in the bowl at relatively low speed.

11. In household mixing apparatus, the combination of a bowl having an upwardly extending sleeve portion therein, a driven shaft structure extending upwardly through said bowl by way of said sleeve portion and extending upwardly above said sleeve portion to a substantial extent, a substantially .radially extending support mounted on the upper end portion .of

centric with respect to the shaft, a gear housing said shaft structure and supp from b neath 16 by said shaft structure independently of the bowl and spaced substantially above the upper end of the bowl sleeve portion, said support being freely detachable with a portion of said shaft structure, which portion is located above the upper end of said bowl sleeve portion, a beater detachably mounted in the outer portion of said support and depending into the bowl, gearing associated with said support for eflectingthe drive of :said heater at an increased speed relatively to the shaft structure, and meanscooperating with said gearing and including an element detachably interengaged with the upper end of said bowl sleeve portion for causing orbital movement of said heater in said bowl.

12. In household mixing apparatus, the combination of a bowl having a substantially central upwardly extending sleeve portion, a driven shaft structure located within said sleeve portion and extending to a point substantially above the upper end of the latter, a support supported on and by said shaft structure independently of said bowl and spaced upwardly from the upper end of said sleeve portion, a pair of heaters having overlapping paths of rotation, depending into said bowl from the outer end portion of said support, said support being freely detachable with a portion of said shaft structure having a detachable connecting joint with another portion of the shaft structure located adjacent the upper end of said sleeve portion, means associated with said beaters for securing them detachably to said support, means mounted on said support for effecting rotation of said heaters about their respective axes, and means located beneath said last-named means and including a gear spaced substantially above the upper end of said sleeve portion for efiecting rotation of said support about the shaft axis, said lastnamed means also including a member having non-rotative engagement with the upper end of said sleeve portion.

, ALFRED C. GILBERT.

ARTHUR A. ARNOLD. 

